Collapsible core.



A. ADAMSON. GOLLAPSI BLE com. APPLICATION FILED MAR. 25, 1914.

1,124,381 Patented Jan.12, 1915.

awe/whoa ALEXANDER AoAMsoN.

G/bbomua constitute an annulus.

ALEXANDERADAMSON, or AKRON, onto.

' COLLAPSIBLE CQRE.

Application filed March 25, 1914. Serial No. 827,087.

Toal l whom it may concern:

Be it known that I, ALEXANDER AnAMsoN,

'a. citizen of the United States, residing at Akron, in the county ofSummit and State of Ohio, have-inventednew and useful Improvements inCollapsible Cores, of which the following isa specification.

This invention relates to improvements in collapsible cores used formanufacturing outer tire shoes of double-tube pneumatic tires, and theobject thereof is to provide a simple, quick-acting and eflicient devicefor. uniting the several segmental portions which are used to form thecore, said device being positive in action, extremely durable muse, and.one in which the locking device is capableof beingreversed. in position,so

that if oneside .of the core flanges become worn fromconstant use, thehard steel looking device, which does not usually wear out as rapidly,can be applied to the other side of the flanges, thereby prolonging thelife and usefulness of a device embodying this invention.

' With the foregoing and other objects in view, the invention .consistsin. the novel construction, combination and arrangement of "partsconstitutingthe invention to be hereinafter specifically describedandillustrated in the accompanying drawings which formapart hereof whereinis shown the preferred embodiment of'the invention, but it is to beunderstood that changes, variations and modifications can be resorted towhich come within the scope of the matter hereinafter claimed.

In the drawings in which similar reference numerals indicate like partsin the different figures, Figure 1, is a combined sectional andperspective view of a portion of a core showing my locking device inoperative engagement therewith. Fig. 2, is a plan view of a coreassembled and showing the locking device in connection therewith; and, Fig. 3, is a plan view of the locking device detached from the core.

A ring-core embodying this invention is customarily constructed of a.plurality of segmental shaped members, which when united together, ashereinafter described, e outer and. lateral faces of which are wapted toimpart a preferred. configuration to the corresponding inner face of thetire shoe which is to be manufactured thereon. The scgmentswh1 ch areemployed to form the core are destg- Specification of Letters Patent.

'acomplete annulus.

Patented $2111.12, 1915..

nated in the drawings by the reference numerals 1, 2, 3 and 4.- It iscustomary in forming these segment-shaped members, to make themhollow toreduce the weight-"of segment closed, so that when the segments areassembled in abutting relation they form The lines of severance 5between the ends of the segment 1 and the segment-shaped members 2 and 3are so' inclined that the member is wedge-shaped constituting'a key fora purpose to be later described. The ends of contiguous sections arealternately provided with grooves'6 and the opposing ends of members areprovided with keys 7 adapted to be received in the grooves 6 and toconstitute interlocking means for preventing lateral movement of thevarious segment-shaped members when they are in assembled relation. Allof the members are provided with inwardly-extending narrow flanges 8,provided at their inner edges with laterally-extending ribs orproiections 9 and 10 extending circumferentially and as all theseflanges and ribs 9 and 10 are identical they are adapted to abut,

against each other when the members are assembled to form the completecore. The inner faces of the ribs 9 are provided with beveled portions11. and 12 forming an obvthe entire core, and with the ends of each tuseangle and at the line of union between 7 them there is provided acircumferentiallyextending V-shaped recess 13 for a purpose to be laterdescribed.

The locking device employed for holding the various segmental-shaped.members in assembled relation comprises a, single ring 14 provided atits outer portion with 'a laterallv projecting flange 15 inwardly ofwhich is a circumferentially-extending recess or groove 16. The innerportion of the member comprises a flange 17 which is wider than theflange 15 and the outer face thereof, by which is meant the face whichopposes or is opposite to the flange '15, is inclined with aninclination approximately parallel to the beveled faces 11 and 12 of theflanges 8. The inner face of the flange 17 is provided with acircumferentiallyextending V-shaped recess 18 for a purpose 10 oftheflange 8 and as the ring is forced to place the inclined outer face ofthe flange .17 engaging either of the beveled faces 11 and 12, sets up aWedging action, tending to force all of the members into perfectalinement by forcing the outer shoulders of the ribs 9 and 10 outwardlyagainst the inner face of the flange 15 which con 'titutes an abutmenttherefor and by the time the ring has been properly set, all of thesegmentalshaped members have been arranged in perfect annular alinement.In order to hold the locking ring 14c against displacement While in use,the screws 19 are run out so that their conical outer ends will engagein the V-shaped recess 13 in the inner faces of the segment-shapedmembers, thereby effectually holding the interlocking rings from beingdisplaced. WVhen it is necessary to mount the assembled'core on a chuckto build up a tire shoe thereon, the three triangularly-positioned armsof the chuck which have sharpened outer termini, engage in the V-shapedrecess 18 in the inner face of the locking member 14, so that thelocking-ring 14 will not interfere with the placing of a tire on thechuck for the tire-shoe-building operation.

I claim:- 7

1. A core of the character described comprising a plurality ofindependent segment shaped sections having interengagingends andinwardly-extending flanges, said flanges provided with ribs at theirinner lateral portion, the inner faces of said flanges and ribs beinginclined, and an integral endless locking ring having one portionadapted to lap the side faces of said-flanges on one side of the coreand the other portion of said ring provided with an inclined face toengage the inner faces of said flanges and ribs and arranged w henpositioned to set up a wedging action for forcing said sections intoregistration, and radially-moving means carried by said ring inposition. 1

'2. A core of the character described comprising a plurality ofindependent segmentsliaped sections having interengaging ends andinwardly-extending flanges, said flanges provided with ribs at theirinner lateral portions, the inner faces of said flanges and ribsbeinginclined, an endless locking ring L- shaped in cross section, oneportion of which is adapted to overlap the lateral faces of the flangeson one side of the core and the other portion provided with an inclinedface to coact with the inner faces of said flanges and ribs for holdingsaid sections in cirfor holding it detachably masses cumferentialregistration, and radially'-act ing means carried by aid ring andengaging said core sections for olding the former in posltlon.

3. Acore of the character described coniprising a plurality ofindependent segmentshaped sections having interengaging ends andinwardly-extending flanges, said flanges provided w th ribs at theirinner lateral which is adapted to overlap the lateral faces I of theflanges on one side of said core and interengage' with the outer facesof said ribs, the other portion of said ring provided with an inclinedouter face to wedgingly engage the inner faces of said flanges and ribsfor holding the sections in circumferential registration, andradially-acting means carried by said ring for holding it in position.

4. A core of the character described comprising a plurality of separablesections having inwardly-extending flanges provided at their innerportions with circumferentially-extending enlargements, the inner faceof the enlargements being inclined in. op-

posite directions forming an obtuse angle, a c1rcumferentially-extendingrecess positioned centrally of the flanges, and a locking-ring providedwith a groove, one of the side walls of which is inclined to engage withone of the inclined inner faces of said flanges, whereby when said ringis positioned and the inclined complemental portions of the ring andsections abut, the sections are held in assembled relation, andradially-acting means carried by said locking ring engaging insaidcirculnferential recess for holding said locking ring againstdisplacement.

5. A core of the character described comprising a plurality of separablesection's having inwardly-extending flanges provided at their innerportions with circumferentiallyextending enlargements, the inner facesof the enlargements being inclined'in opposite directions forming anobtuse angle with respect to each other, and a locking ring providedwith an annular groove adapted to be applied to the side face" of. saidflanges with oneside of the enlargement positioned in said groove, saidgroove having an inclined wall adapted to abut against one of theinclined faces of said enlargement whereby when said ring'is positionedit serves to hold the sections assembled, said locking ring furtherprovided with radially-positioned threadedopenings, and screws mountedin said openings adapted when shifted to engage the flanges for holdingthe lockingring against displacement.

6, A core of the character described comprisinga plurality of separablesections having inwardly-extending flanges provided. on

opposite sides near. their inner edges with laterally-projecting ribs,the outer walls whereof constitute abutments, with the inner faces ofsaid ribs inclined inwardly and also inclined toward each other to forman obtuse angle with respect to one another, and a locking-ring providedwith a groove the outer Wall of which is arranged at right angles withthe floor of the groove "and the other" wall inclined to engage andco-act with the inclined inner face of said sections whereby when saidring is positioned it serves to hold the sections assembled, andradially-acting means carried by said locking-ring engaging saidsections for holding said locking-ring against displacement.

7. A core of the character described comprising a plurality ofindependent segment shaped sections having interengaging ends andinwardly-extending flanges, said flanges provided with ribs at theirinner lateral portions, the inner faces of said flanges and.

ribs being inclined, an endless locg a 1- L-shaped in cross section, oneportion which is adapted to overlap the lateral f of the flanges on oneside of said core and interengaged with the outer faces of said ribs,the other portion of said ring prinnded with an inclined outer face towedginglg; en-

gage the inner faces of said flanges and ribs for holdingthe sections incircumferential registration, said inclined portion of said ringprovided with a threaded opening, and. a screw mounted in said threadedopening witnesses. v

ALEXANDER ADAMSON.

Witnesses 2 G. E. HUMPHREY, A. L. MoCLrNTooK.

